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Version History:

 1.0 1997-05-13 initial release, not validated

 1.1 1997-05-30 Test harness, enumerator, toVector

 1.2 1998-03-16 fix bug in insertElement if there is only one element in the
                list already.

 1.3 1998-06-24 add JavaDOC

 1.4 1998-11-10 new address

 1.5 2008-01-01 move to its own package.

 1.6 2008-02-18 generify

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